Marines with Headquarters and Service Company, 3D Assault Amphibian Battalion, 1st Marine Division, conduct amphibious combat sustainment training near White Beach aboard Marine Corps Base Camp Pendleton, Calif., June 38-30, 2016. The exercises helped leaders within 3D AA Bn. evaluate their newer Marines while ensuring their own skills remain sharp. The battalion is charged with forcible entry and ship-to-shore transportation of the ground combat element of I Marine Expeditionary Force. (U.S. Marine Corps photo by Sgt. Jacob D. Osborne/Released)